1. This is the weighted average sale price per share for these transactions executed on 10/19/2011. These sales were executed in multiple lots at prices ranging from $7.17 through $7.42 per share. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request by the Commission staff, the issuer or a security holder of the issuer.

2. This is the weighted average sale price per share for these transactions executed on 10/20/2011. These sales were executed in multiple lots at prices ranging from $7.00 through $7.23 per share. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request by the Commission staff, the issuer or a security holder of the issuer.